{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:JDGYWPSN5JL7C3B2TKVMU4QB7A","short_pith_number":"pith:JDGYWPSN","canonical_record":{"source":{"id":"1009.4303","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2010-09-22T09:04:16Z","cross_cats_sorted":[],"title_canon_sha256":"a54f671f29e6b8ca5e69ea7e51aab0c3ec6067486fd350fc2ead8246e2bb78c8","abstract_canon_sha256":"6629d64070b699d33d74bf60897ec7646c0ab590f1272985991fa685e8171ea0"},"schema_version":"1.0"},"canonical_sha256":"48cd8b3e4dea57f16c3a9aaaca7201f8024677d834c54e54736f62af675987d7","source":{"kind":"arxiv","id":"1009.4303","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1009.4303","created_at":"2026-05-18T02:05:18Z"},{"alias_kind":"arxiv_version","alias_value":"1009.4303v1","created_at":"2026-05-18T02:05:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1009.4303","created_at":"2026-05-18T02:05:18Z"},{"alias_kind":"pith_short_12","alias_value":"JDGYWPSN5JL7","created_at":"2026-05-18T12:26:09Z"},{"alias_kind":"pith_short_16","alias_value":"JDGYWPSN5JL7C3B2","created_at":"2026-05-18T12:26:09Z"},{"alias_kind":"pith_short_8","alias_value":"JDGYWPSN","created_at":"2026-05-18T12:26:09Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:JDGYWPSN5JL7C3B2TKVMU4QB7A","target":"record","payload":{"canonical_record":{"source":{"id":"1009.4303","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2010-09-22T09:04:16Z","cross_cats_sorted":[],"title_canon_sha256":"a54f671f29e6b8ca5e69ea7e51aab0c3ec6067486fd350fc2ead8246e2bb78c8","abstract_canon_sha256":"6629d64070b699d33d74bf60897ec7646c0ab590f1272985991fa685e8171ea0"},"schema_version":"1.0"},"canonical_sha256":"48cd8b3e4dea57f16c3a9aaaca7201f8024677d834c54e54736f62af675987d7","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:05:18.810745Z","signature_b64":"2zcSJ1GNgb1am5WzQAnbsuGmQNl7piwd2pMvl+rS0+xJMmPBk6BxFZa490IFzrIoPIf+qhRkaZ6L9hv5ZIwVCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"48cd8b3e4dea57f16c3a9aaaca7201f8024677d834c54e54736f62af675987d7","last_reissued_at":"2026-05-18T02:05:18.810035Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:05:18.810035Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1009.4303","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:05:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UOAtVfQmwrqvE2C+VCf4QxJWLwfDMnkfeV/31aDMlUuYmwe/FLBF6QKUaFrdl9sxpVN+92VO4L1MnLgfSQ3fBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T15:52:33.895197Z"},"content_sha256":"0d16726dd30d4c5283dd1e5797c44d7a99c58237401f92c500302e3185aaae88","schema_version":"1.0","event_id":"sha256:0d16726dd30d4c5283dd1e5797c44d7a99c58237401f92c500302e3185aaae88"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:JDGYWPSN5JL7C3B2TKVMU4QB7A","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Density-based mixing parameter for hybrid functionals","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Julien Vidal, Lucia Reining, Micael J. T. Oliveira, Miguel A. L. Marques, Silvana Botti","submitted_at":"2010-09-22T09:04:16Z","abstract_excerpt":"A very popular ab-initio scheme to calculate electronic properties in solids is the use of hybrid functionals in density functional theory (DFT) that mixes a portion of Fock exchange with DFT functionals. In spite of their success, a major problem still remains, related to the use of one single mixing parameter for all materials. Guided by physical arguments that connect the mixing parameter to the dielectric properties of the solid, and ultimately to its band gap, we propose a method to calculate this parameter from the electronic density alone. This method is able to cut significantly the er"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1009.4303","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:05:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"g04zm9PE2lcGfYwjl7l2b8FpfNrTZEriLJUzEpPl0ElCkPTU00mWGb6tAz45Wl2Z6SmLt03RGb4qaUhA3o8mBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T15:52:33.895554Z"},"content_sha256":"01471aeaabaf9fd6940aab83a11538e6ad5da5711ce1b3d3e44e526b94a2787b","schema_version":"1.0","event_id":"sha256:01471aeaabaf9fd6940aab83a11538e6ad5da5711ce1b3d3e44e526b94a2787b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JDGYWPSN5JL7C3B2TKVMU4QB7A/bundle.json","state_url":"https://pith.science/pith/JDGYWPSN5JL7C3B2TKVMU4QB7A/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JDGYWPSN5JL7C3B2TKVMU4QB7A/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-09T15:52:33Z","links":{"resolver":"https://pith.science/pith/JDGYWPSN5JL7C3B2TKVMU4QB7A","bundle":"https://pith.science/pith/JDGYWPSN5JL7C3B2TKVMU4QB7A/bundle.json","state":"https://pith.science/pith/JDGYWPSN5JL7C3B2TKVMU4QB7A/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JDGYWPSN5JL7C3B2TKVMU4QB7A/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:JDGYWPSN5JL7C3B2TKVMU4QB7A","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"6629d64070b699d33d74bf60897ec7646c0ab590f1272985991fa685e8171ea0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2010-09-22T09:04:16Z","title_canon_sha256":"a54f671f29e6b8ca5e69ea7e51aab0c3ec6067486fd350fc2ead8246e2bb78c8"},"schema_version":"1.0","source":{"id":"1009.4303","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1009.4303","created_at":"2026-05-18T02:05:18Z"},{"alias_kind":"arxiv_version","alias_value":"1009.4303v1","created_at":"2026-05-18T02:05:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1009.4303","created_at":"2026-05-18T02:05:18Z"},{"alias_kind":"pith_short_12","alias_value":"JDGYWPSN5JL7","created_at":"2026-05-18T12:26:09Z"},{"alias_kind":"pith_short_16","alias_value":"JDGYWPSN5JL7C3B2","created_at":"2026-05-18T12:26:09Z"},{"alias_kind":"pith_short_8","alias_value":"JDGYWPSN","created_at":"2026-05-18T12:26:09Z"}],"graph_snapshots":[{"event_id":"sha256:01471aeaabaf9fd6940aab83a11538e6ad5da5711ce1b3d3e44e526b94a2787b","target":"graph","created_at":"2026-05-18T02:05:18Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"A very popular ab-initio scheme to calculate electronic properties in solids is the use of hybrid functionals in density functional theory (DFT) that mixes a portion of Fock exchange with DFT functionals. In spite of their success, a major problem still remains, related to the use of one single mixing parameter for all materials. Guided by physical arguments that connect the mixing parameter to the dielectric properties of the solid, and ultimately to its band gap, we propose a method to calculate this parameter from the electronic density alone. This method is able to cut significantly the er","authors_text":"Julien Vidal, Lucia Reining, Micael J. T. Oliveira, Miguel A. L. Marques, Silvana Botti","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2010-09-22T09:04:16Z","title":"Density-based mixing parameter for hybrid functionals"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1009.4303","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:0d16726dd30d4c5283dd1e5797c44d7a99c58237401f92c500302e3185aaae88","target":"record","created_at":"2026-05-18T02:05:18Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"6629d64070b699d33d74bf60897ec7646c0ab590f1272985991fa685e8171ea0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2010-09-22T09:04:16Z","title_canon_sha256":"a54f671f29e6b8ca5e69ea7e51aab0c3ec6067486fd350fc2ead8246e2bb78c8"},"schema_version":"1.0","source":{"id":"1009.4303","kind":"arxiv","version":1}},"canonical_sha256":"48cd8b3e4dea57f16c3a9aaaca7201f8024677d834c54e54736f62af675987d7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"48cd8b3e4dea57f16c3a9aaaca7201f8024677d834c54e54736f62af675987d7","first_computed_at":"2026-05-18T02:05:18.810035Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:05:18.810035Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"2zcSJ1GNgb1am5WzQAnbsuGmQNl7piwd2pMvl+rS0+xJMmPBk6BxFZa490IFzrIoPIf+qhRkaZ6L9hv5ZIwVCA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:05:18.810745Z","signed_message":"canonical_sha256_bytes"},"source_id":"1009.4303","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0d16726dd30d4c5283dd1e5797c44d7a99c58237401f92c500302e3185aaae88","sha256:01471aeaabaf9fd6940aab83a11538e6ad5da5711ce1b3d3e44e526b94a2787b"],"state_sha256":"5736f06aaa727f561040995e26a695a4b5cb769e75f2f9f84927a85cfd6eae04"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dmOrCIZLP8uL7iD19t09ssgrlxadjtXCAs1s2R486p67SveKTvL+rSMN0OZAHRncnM/VcVN9ZmBLiHqt9xPGBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-09T15:52:33.897477Z","bundle_sha256":"8d8679e80d64fb2f28dc88b21007156ea239dd50f980077f534fda0f3c4863f2"}}